In facial aesthetics, the position of maxillary central incisor plays a significant role. During orthodontics treatment, in order to ensure that the maxillary central incisor can be safely moved to the target position, it is necessary to clarify the limits of its movable range. Previous studies have shown that there is an anatomical structure between the palatal cortical bone and the maxillary central incisor, namely the incisive canal, which may lead to an increased risk of root resorption if the anterior teeth beyond this structural limit during retraction. In order to prevent such complications, it is necessary to deeply understand and accurately grasp the spatial position relationship and characteristics between the incisive canal and the maxillary central incisor. The purpose of this article is to review the relationship between incisal canal and three-dimensional movement of maxillary central incisor.